Principal Solar Institute

A community for development and installation professionals in the solar industry

The Principal Solar Institute Module Ratings

The Principal Solar Institute’s scientifically designed and certified combination of tests and performance standards provide an unbiased, comprehensive rating system – the PSI PV module rating. Seven essential characteristics related to initial and long-term PV module performance are combined to create the PSI Rating:

  • Actual Tested Maximum Power vs. Advertised
  • Temperature Coefficient at Maximum Power
  • Power at Low Irradiance to Power at High Irradiance Ratio
  • Normal Operating Cell Temperature (NOCT)
  • Total Area Efficiency
  • Negative Power Tolerance
  • Annual Power Reduction

These ratings allow you to make comparisons when analyzing PV modules and help you select the optimal PV module.

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PSI Ratings – PV Solar Modules from Bosch Solar Energy

Here are the PSI Ratings for modules from Bosch Solar Energy, calculated based on initial performance test data. If you don’t see a solar module that you are considering, contact us and we will try to add it.

Rank Manufacturer Model Type Power
(W DC)
PSI Rating Percentile
1Bosch Solar Energyc-Si M60 NA 44117 270WpMonocrystalline2708.38*88
2Bosch Solar Energyc-Si M60 NA 44117 265WpMonocrystalline2658.22*84
3Bosch Solar Energyc-Si M60 NA42117 255WMonocrystalline2558.16*82
4Bosch Solar Energyc-Si M 60-240-16Monocrystalline2408.12*80
5Bosch Solar Energyc-Si M60 NA30119-255WpMonocrystalline2558.08*79
6Bosch Solar Energyc-Si M60 NA 44117 260WpMonocrystalline2608.07*78
7Bosch Solar Energyc-Si M60 NA42117 250WMonocrystalline2508.00*76
8Bosch Solar Energyc-Si M 60-235-16Monocrystalline2357.94*73
9Bosch Solar Energyc-Si M60 NA42117 245WMonocrystalline2457.84*67
10Bosch Solar Energyc-Si M 72 NA41126 305WpMonocrystalline3057.82*66
11Bosch Solar Energyc-Si M 60 NA30117 245WMonocrystalline2457.79*65
12Bosch Solar Energyc-Si M 60-230-16Monocrystalline2307.78*64
13Bosch Solar Energyc-Si M 72 NA41126 300WpMonocrystalline3007.68*59
14Bosch Solar Energyc-Si M 60 NA30117 240WMonocrystalline2407.67*58
15Bosch Solar Energyc-Si M 60-225-16Monocrystalline2257.61*54
16Bosch Solar Energyc-Si P 72 NA22126 295WpPolycrystalline2957.57*52
17Bosch Solar Energyc-Si P 72 NA21126 295WpPolycrystalline2957.57*52
18Bosch Solar Energyc-Si M 72 NA41126 295WpMonocrystalline2957.57*52
19Bosch Solar Energyc-Si M 60 NA30117 235WMonocrystalline2357.55*51
20Bosch Solar Energyc-Si M60 NA30119-250WpMonocrystalline2507.47*46
21Bosch Solar Energyc-Si P 72 NA22126 290WpPolycrystalline2907.42*43
22Bosch Solar Energyc-Si M 72 NA41126 290WpMonocrystalline2907.42*43
23Bosch Solar Energyc-Si P 72 NA21126 290WpPolycrystalline2907.42*43
24Bosch Solar Energyc-Si M 60 NA30117 230WMonocrystalline2307.41*42
25Bosch Solar Energyc-Si M60 NA30119-245WpMonocrystalline2457.33*38
26Bosch Solar Energyc-Si P 72 NA22126 285WpPolycrystalline2857.31*36
27Bosch Solar Energyc-Si P 72 NA21126 285WpPolycrystalline2857.31*36
28Bosch Solar Energyc-Si M60 NA30119-240WpMonocrystalline2407.18*29
29Bosch Solar Energyc-Si P 72 NA21126 280WpPolycrystalline2807.17*29
30Bosch Solar Energyc-Si P 72 NA22126 280WpPolycrystalline2807.17*29
31Bosch Solar Energyc-Si P 72 NA22126 275WpPolycrystalline2757.05*23
32Bosch Solar Energyc-Si P 72 NA21126 275WpPolycrystalline2757.05*23

* Modules denoted with an “*” use estimated values for one or more characteristics. Manufacturers can contact us to provide the missing data for these PV modules.

NOTE: PSI Ratings are based on publicly available data, and are subject to change as additional data and proprietary analyses become available for long-term performance.